package com.yupi.yupicturebackend.controller;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.github.benmanes.caffeine.cache.Cache;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.yupi.yupicturebackend.annotation.AuthCheck;
import com.yupi.yupicturebackend.common.BaseResponse;
import com.yupi.yupicturebackend.common.DeleteRequest;
import com.yupi.yupicturebackend.common.ResultUtils;
import com.yupi.yupicturebackend.constants.UserConstant;
import com.yupi.yupicturebackend.exception.BusinessException;
import com.yupi.yupicturebackend.exception.ErrorCode;
import com.yupi.yupicturebackend.exception.ThrowUtils;
import com.yupi.yupicturebackend.model.entity.Space;
import com.yupi.yupicturebackend.model.entity.User;
import com.yupi.yupicturebackend.model.enums.SpaceLevelEnum;
import com.yupi.yupicturebackend.model.req.space.*;
import com.yupi.yupicturebackend.model.vo.SpaceVO;
import com.yupi.yupicturebackend.service.SpaceService;
import com.yupi.yupicturebackend.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;


/**
 * @Author: 小新
 * @Date: 2025/3/31 19:31
 * @Description: 文件接口
 * @Version: v1.0
 */
@RestController
@RequestMapping("/space")
@Slf4j
public class SpaceController {

    @Resource
    private UserService userService;
    @Resource
    private SpaceService spaceService;

    @PostMapping("/add")
    public BaseResponse<Long> addSpace(@RequestBody SpaceAddRequest spaceAddRequest,HttpServletRequest request){
        //1. 校验参数
        ThrowUtils.throwIf(spaceAddRequest == null, ErrorCode.PARAMS_ERROR);
        //2. 获取登录用户
        User loginUser = userService.getLoginUser(request);
        //3. 创建空间
        long newSpaceId = spaceService.addSpace(spaceAddRequest, loginUser);
        return ResultUtils.success(newSpaceId);
    }

    /**
     * 删除空间（仅管理员和用户自己可以删除）
     */
    @PostMapping("/delete")
    public BaseResponse<Boolean> deleteSpace(@RequestBody DeleteRequest deleteRequest, HttpServletRequest request) {

        //1. 校验参数
        ThrowUtils.throwIf(deleteRequest == null, ErrorCode.PARAMS_ERROR);

        //2.获取空间id
        Long id = deleteRequest.getId();
        User loginUser = userService.getLoginUser(request);

        //3. 校验空间是否存在
        Space oldSpace = spaceService.getById(id);
        ThrowUtils.throwIf(oldSpace == null, ErrorCode.PARAMS_ERROR);

        //4.校验权限
        if (!Objects.equals(oldSpace.getUserId(), loginUser.getId()) && !UserConstant.ADMIN_ROLE.equals(loginUser.getUserRole())) {
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
        }

        //5.删除空间
        boolean result = spaceService.removeById(id);
        // TODO 关联删除空间内的图片

        log.info("删除空间(id)：{}", id);
        if (!result) {
            throw new BusinessException(ErrorCode.SYSTEM_ERROR, "空间删除失败");
        }
        return ResultUtils.success(true);
    }

    /**
     * 更新空间（仅管理员可用）
     */
    @PostMapping("/update")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Boolean> updateSpace(@RequestBody SpaceUpdateRequest spaceUpdateRequest, HttpServletRequest request) {
        if (spaceUpdateRequest == null || spaceUpdateRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        // 将实体类和 DTO 进行转换
        Space space = new Space();
        BeanUtils.copyProperties(spaceUpdateRequest, space);
        // 自动填充数据
        spaceService.fillSpaceBySpaceLevel(space);
        // 数据校验
        spaceService.validSpace(space, false);
        // 判断是否存在
        long id = spaceUpdateRequest.getId();
        Space oldSpace = spaceService.getById(id);
        ThrowUtils.throwIf(oldSpace == null, ErrorCode.NOT_FOUND_ERROR);
        // 操作数据库
        boolean result = spaceService.updateById(space);
        log.info("管理员更新空间：{}", space);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
        return ResultUtils.success(true);
    }

    /**
     * 根据id获取空间（仅管理员可用）
     */
    @GetMapping("/get")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Space> getSpaceById(Long id, HttpServletRequest request) {

        //1. 参数校验
        if (id == null || id <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        //2. 数据库查询
        Space space = spaceService.getById(id);
        if (space == null) {
            throw new BusinessException(ErrorCode.NOT_FOUND_ERROR);
        }
        //2.返回结果
        return ResultUtils.success(space);
    }


    /**
     * 根据 id 获取空间（封装类）
     */
    @GetMapping("/get/vo")
    public BaseResponse<SpaceVO> getSpaceVOById(long id, HttpServletRequest request) {
        ThrowUtils.throwIf(id <= 0, ErrorCode.PARAMS_ERROR);
        // 查询数据库
        Space space = spaceService.getById(id);
        ThrowUtils.throwIf(space == null, ErrorCode.NOT_FOUND_ERROR);
        // 获取封装类
        return ResultUtils.success(spaceService.getSpaceVO(space, request));
    }


    @PostMapping("/list/page")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Page<Space>> listSpaceByPage(@RequestBody SpaceQueryRequest spaceQueryRequest, HttpServletRequest request) {
        int current = spaceQueryRequest.getCurrent();
        int pageSize = spaceQueryRequest.getPageSize();

        Page<Space> spacePage = spaceService.page(new Page<>(current, pageSize), spaceService.getQueryWrapper(spaceQueryRequest));
        return ResultUtils.success(spacePage);
    }

    /**
     * 分页获取空间列表（封装类）
     */
    @PostMapping("/list/page/vo")
    public BaseResponse<Page<SpaceVO>> listSpaceVOByPage(@RequestBody SpaceQueryRequest spaceQueryRequest,
                                                         HttpServletRequest request) {
        long current = spaceQueryRequest.getCurrent();
        long size = spaceQueryRequest.getPageSize();
        // 限制爬虫
        ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
        // 查询数据库
        QueryWrapper<Space> queryWrapper = spaceService.getQueryWrapper(spaceQueryRequest);
        Page<Space> spacePage = spaceService.page(new Page<>(current, size),
                queryWrapper);
        // 获取封装类
        return ResultUtils.success(spaceService.getSpaceVOPage(spacePage, request));
    }

    /**
     * 编辑空间（给用户使用）
     */
    @PostMapping("/edit")
    public BaseResponse<Boolean> editSpace(@RequestBody SpaceEditRequest spaceEditRequest, HttpServletRequest request) {
        if (spaceEditRequest == null || spaceEditRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        // 在此处将实体类和 DTO 进行转换
        Space space = new Space();
        BeanUtils.copyProperties(spaceEditRequest, space);

        // 设置编辑时间
        space.setEditTime(new Date());
        // 自动填充数据
        spaceService.fillSpaceBySpaceLevel(space);
        // 数据校验
        spaceService.validSpace(space, false);
        User loginUser = userService.getLoginUser(request);

        // 判断是否存在
        long id = spaceEditRequest.getId();
        Space oldSpace = spaceService.getById(id);
        ThrowUtils.throwIf(oldSpace == null, ErrorCode.NOT_FOUND_ERROR);
        // 仅本人或管理员可编辑
        if (!oldSpace.getUserId().equals(loginUser.getId()) && !userService.isAdmin(loginUser)) {
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
        }
        // 操作数据库
        boolean result = spaceService.updateById(space);
        log.info("用户更新空间：{}", space);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
        return ResultUtils.success(true);
    }


    /**
     * 获取空间级别列表便于前端展示
     * @return
     */
    @GetMapping("/list/level")
    public BaseResponse<List<SpaceLevel>> listSpaceLevel() {
        List<SpaceLevel> spaceLevelList = Arrays.stream(SpaceLevelEnum.values()) // 获取所有枚举
                .map(spaceLevelEnum -> new SpaceLevel(
                        spaceLevelEnum.getValue(),
                        spaceLevelEnum.getText(),
                        spaceLevelEnum.getMaxCount(),
                        spaceLevelEnum.getMaxSize()))
                .collect(Collectors.toList());
        return ResultUtils.success(spaceLevelList);
    }


}
